<template>
  <div class="add">
    <Breadcrumb name1="商品管理" name2="添加商品" />
    <!--    卡片视图-->
    <el-card>
      <!--      提示区-->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        :closable="false"
        show-icon
      >
      </el-alert>
      <!--      步骤条区-->
      <el-steps align-center :active="activeIndex - 0" finish-status="success">
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!--      table --- > tab栏区域-->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-position="top"
        label-width="100px"
      >
        <el-tabs
          :tab-position="'left'"
          v-model="activeIndex"
          :before-leave="beforeTabLevae"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <!-- 级联选择器 -->
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="{ expandTrigger: 'hover', ...cateProps }"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的item项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  border
                  :label="item"
                  v-for="(item, i) in item.attr_vals"
                  :key="i"
                  >{{ item }}</el-checkbox
                >
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!--
             action 表示图片要上传到的后台API地址
             handlePreview 点击预览触发
             handleRemove 删除图片触发
             fileList 指定文件列表
             list-type 指定预览组件的呈现方式
            -->
            <el-upload
              class="upload-demo"
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headersObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器组件 Two-way Data-Binding -->
            <quill-editor
              ref="myQuillEditor"
              v-model="addForm.goods_introduce"
            />
            <!--            添加按钮-->
            <el-button type="primary" class="AddBtn" @click="addShop"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!--    图片预览-->
    <el-dialog
      title="图片预览"
      :visible.sync="previewDialogVisible"
      width="50%"
    >
      <img :src="previewPath" alt="" class="perviewImg" />
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
import { goodsAddFormRulesMixin } from '@/common/mixin.js'
import Breadcrumb from 'components/content/breadcrumb/Breadcrumb'
export default {
  name: 'Add',
  components: {
    Breadcrumb
  },
  mixins: [goodsAddFormRulesMixin],
  data() {
    return {
      activeIndex: '0',
      // 添加商品的表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: [],
        // 图片的数组
        pics: [],
        // 商品的详情描述
        goods_introduce: '',
        attrs: []
      },
      // 存放商品列表数据
      cateList: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      // 动态参数列表数据
      manyTableData: [],
      // 静态参数列表数据
      onlyTableData: [],
      // 上传图片的URL地址
      uploadURL: 'https://lianghj.top:8888/api/private/v1/upload',
      // 图片上传组件的headers请求头对象
      headersObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 预览图片的路径
      previewPath: '',
      // 图片预览的对话框
      previewDialogVisible: false
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品列表失败!')
      }
      this.cateList = res.data
      console.log(this.cateList)
    },
    // 级联选择项变化触发
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
      console.log(this.addForm.goods_cat)
    },
    // 离开当前 Tabs 页
    beforeTabLevae(activeName, oldActiveName) {
      // console.log('即将离开标签页的名字: ', oldActiveName)
      // console.log('即将进入标签页的名字: ', activeName)
      if (
        (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) ||
        this.addForm.goods_name === ''
      ) {
        this.$message.error('请先选择商品分类! 或 填写商品名称')
        return false
      }
    },
    async tabClicked() {
      // 证明访问的是动态列表
      if (this.activeIndex === '1') {
        console.log('动态参数')
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'many' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态列表失败!')
        }
        res.data.forEach(
          item =>
            (item.attr_vals =
              item.attr_vals.length === 0 ? [] : item.attr_vals.split(' '))
        )
        // console.log(res)
        this.manyTableData = res.data
      }
      if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'only' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态列表失败!')
        }
        this.onlyTableData = res.data
        console.log(this.onlyTableData)
      }
    },
    // 点击图片预览时触发
    handlePreview(file) {
      this.previewPath = file.response.data.url
      this.previewDialogVisible = true
      console.log('预览图片', file.response.data.url)
    },
    // 处理移除图片的操作
    handleRemove(file) {
      // 1. 获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2. 从 pics 数组中找到这个图片的对应的索引值
      const index = this.addForm.pics.findIndex(x => x.pic === filePath)
      // 3. 调用数组的splice方法,把图片信息对象,从pics数组中移除
      this.addForm.pics.splice(index, 1)
      console.log('移除图片', file, this.addForm)
    },
    // 监听图片上传成功的事件
    handleSuccess(resposne) {
      // 1. 拼接得到一个图片信息对象
      const picInfo = { pic: resposne.data.tmp_path }
      // 2. 将图片信息对象,push到pics数组中
      this.addForm.pics.push(picInfo)
      console.log(resposne)
      console.log(this.addForm)
    },
    addShop() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项')
        }
        // 执行添加的业务逻辑
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_vals: item.attr_vals }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态参数
        this.onlyTableData.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_vals: item.attr_vals }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        // console.log(form)
        // 发起请求添加商品数据
        // 商品的名称必须是唯一的
        const { data: res } = await this.$http.post('goods', form)
        console.log(res)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败!')
        }
        this.$message.success('添加商品成功!')
        this.$router.push('/goods')
        // 不能直接做转换因为在 级联选择器 中双向绑定了 goods_cat 作为key
        // this.addForm.goods_cat = this.addForm.goods_cat.join(',')
      })
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.el-steps {
  margin: 15px 0;
}
.el-step__title {
  font-size: 13px;
}
.el-checkbox {
  margin: 0 5px 0 0 !important;
}
.perviewImg {
  width: 100%;
}
.AddBtn {
  margin-top: 15px;
}
</style>
